21.8 The Citric Acid Cycle

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Copyright © 2010 Pearson Education, Inc. Chapter Twenty One 4
21.9 <strong>The</strong> Electron-Transport Chain and Copyright © 2010 Pearson Education, Inc. ATP Production • At the conclusion of the citric acid cycle, the reduced coenzymes formed in the cycle are ready to donate their energy to making additional ATP • Hydrogen and electrons from NADH and FADH 2 enter the electron-transport chain at enzyme complexes I and II, respectively. • <strong>The</strong> enzyme for Step 6 of the citric acid cycle is part of complex II. FADH 2 produced there does not leave complex II. Instead it is immediately oxidized there by reaction with coenzyme Q. • Following formation of the mobile coenzyme Q, reductions occur when electrons are transferred. Chapter Twenty One 5
Page 1 and 2: Copyright © 2010 Pearson Education
Page 3: • The net result of the citric ac
Page 7 and 8: Other important electron acceptors
Page 9 and 10: • The H + concentration differenc
Page 11 and 12: 21.10 Harmful Oxygen By-Products Co
Page 13 and 14: • Our protection against harmful

21.8 The Citric Acid Cycle

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